64. Biological tissues are typically made up of 98 % water. Given that the density of water is $1.0 \times 10^{3} \mathrm{~kg} / \mathrm{m}^{3}$, estimate the mass of (a) the heart of an adult human; (b) a cell with a diameter of $0.5 \mu \mathrm{m}$; (c) a honey bee.

 64. Biological tissues are typically made up of 98 % water. Given that the density of water is $1.0 \times 10^{3} \mathrm{~kg} / \mathrm{m}^{3}$, estimate the mass of (a) the heart of an adult human; (b) a cell with a diameter of $0.5 \mu \mathrm{m}$; (c) a honey bee.